#include "junix.h"

class List;

struct Node {
	Node(int v=0,Node *n=NULL) 
		: data(v), next(n) { }

	friend class List;

	int data;
	Node *next;
};

class List {
	public:
		List() : head(NULL) { }

	private:
		Node *head;
};

int main(){
}
